Rokeby Resources Strikes Exceptional Silver-Copper at Macauley Creek Project

Rokeby Resources Delivers Spectacular High-Grade Silver and Copper Results at Macauley Creek

Rokeby Resources Limited (ASX: RKB) has announced outstanding exploration results from its 90%-owned Rokeby Resources Ltd Macauley Creek project in northern Queensland, with rock chip sampling revealing exceptional grades including 1,204 g/t silver and 5.37% copper. The results from the November 2025 field programme have not only confirmed the high-grade potential of existing prospects but also identified two new prospects with significant mineralisation.

The comprehensive sampling programme collected 84 rock chip samples across multiple prospects, with results demonstrating the project's exceptional metal endowment. Furthermore, these findings have expanded the known mineralised footprint significantly.

Multiple High-Grade Prospects Deliver Outstanding Results

Central Prospect Powers Ahead with Exceptional Grades

The Central Prospect has delivered the programme's standout results, with three samples returning extraordinary silver and copper grades. Moreover, these results confirm the exceptional nature of the Rokeby Resources Ltd Macauley Creek project mineralisation.

The Central prospect encompasses a 2.3km mineralised trend containing several historical workings including Mount Long, Copper Knob, Western and Silver King. The mineralisation is hosted within granite rocks and associated smaller intrusive bodies.

Additionally, structurally-controlled mineralisation occurs in dilated jogs and steep fracture intersections. This geological understanding provides crucial insights for future exploration targeting.

Copper Cap: A New High-Grade Discovery

The newly identified Copper Cap prospect, located 8km northeast of Central, has delivered impressive initial results from limited sampling. For instance, the highest-grade sample returned exceptional values.

• 275 g/t silver and 5.37% copper (MCRX00075)
• 5 g/t silver and 1.0% copper (MCRX00074)

CEO Trevor Benson commented: "The identification of new prospects with anomalous concentrations with little geological constraints encourages Rokeby to further evaluate the Macauley Creek Project area. We are looking forward to progressing follow-up exploration programmes to build on these significant results."

Wallaroo Prospect Confirms Historical High-Grade Potential

The Wallaroo prospect continues to demonstrate exceptional grades, with five rock chips all returning anomalous results. However, the most significant results include:

• 179 g/t silver and 0.97% copper (MCRX00051)
• 35 g/t silver and 3.58% copper (MCRX00070)

These results complement previous outstanding grades from this prospect, including 465 g/t silver with 49.0% copper. In addition, they confirm the area's high-grade potential across a 2.3km trend.

Understanding Porphyry-Style Mineralisation

Porphyry deposits are large-tonnage, low-to-moderate grade copper-gold deposits formed by hot fluids associated with intrusive igneous rocks. However, the high-grade nature of the Rokeby Resources Ltd Macauley Creek project results suggests a more concentrated mineralising system.

This potentially represents several key characteristics:

• Structural controls that concentrate mineralising fluids
• Proximity to mineralising centres where grade intensity increases
• Multiple mineralising events that can create exceptional-grade zones

For investors, porphyry-style systems are significant because they can host large-scale, long-life mining operations with substantial metal endowments. Furthermore, the combination of high grades and extensive strike length at the project suggests significant economic potential.

Strategic Location Enhances Development Prospects

The Rokeby Resources Ltd Macauley Creek project benefits from exceptional infrastructure access, located just 150km west of Townsville in North Queensland. In addition, several key advantages enhance its development prospects:

• Sealed road access from a major regional centre
• Proximity to port facilities in Townsville for potential future exports
• Established mining region with available skilled workforce
• Existing power and telecommunications infrastructure nearby

The project sits within the Townsville-Mornington Island Igneous Belt, a region renowned for intrusion-related and contact-style mineral systems. Moreover, this provides an established geological framework for continued exploration success.

Comprehensive Exploration Programme Reveals Systematic Potential

Expanding the Mineralised Footprint

The November programme has significantly expanded the known mineralised area through the identification of multiple new prospects. Furthermore, this demonstrates the systematic approach adopted by Rokeby Resources.

What Makes This Approach Effective?

Rokeby's methodical exploration strategy has proven effective through several key elements. For instance, the company has focused on systematic validation and expansion:

1. Historical validation – Confirming previous high-grade results
2. Regional reconnaissance – Identifying new mineralised areas
3. Geological mapping – Understanding structural controls
4. Systematic sampling – Building comprehensive database

Forward-Looking Exploration Strategy

Immediate Next Steps

Rokeby has outlined a comprehensive programme to build on these exceptional results. However, the strategy requires careful sequencing to maximise effectiveness.

Detailed Regional Mapping Programme

The company will build geological understanding across the entire project area. Additionally, this will identify additional prospects for evaluation and map structural controls on mineralisation.

Geochemical Target Generation

Reconnaissance soil sampling lines will assess the effectiveness of geochemical exploration methods. Furthermore, this systematic approach will enable comprehensive target identification.

Geophysical Surveys

These are planned following completion of the mapping programme. In addition, they will refine drill targets using integrated datasets and define structural controls and mineralised zones.

Timeline and Catalysts

Based on the exploration strategy outlined, investors can anticipate several key milestones:

• Q1 2026: Completion of detailed mapping programme
• Q2 2026: Geochemical and geophysical surveys
• H2 2026: Definition of priority drill targets
• 2027: Potential maiden drilling programme

Investment Thesis: Multi-Prospect, High-Grade Discovery

Exceptional Grade Profile Sets RKB Apart

The grade intensity achieved at the project places Rokeby among elite-grade developers. For instance, several factors distinguish these results:

• Silver grades exceeding 1,000 g/t are exceptional by global standards
• Copper grades above 5% indicate potential for high-margin operations
• Multi-element suites (Ag-Cu-Pb-Zn) provide diversified revenue potential

Scale Potential Through Multiple Prospects

The identification of multiple high-grade prospects across a large tenement package indicates significant potential. Furthermore, this suggests several key advantages:

• District-scale mineralising system rather than isolated occurrences
• Expansion potential through systematic exploration
• Multiple development scenarios from high-grade zones to larger tonnage targets

Strategic Value in Premium Location

The project's location offers significant development advantages that distinguish it from competitors. However, these benefits extend beyond simple proximity:

• Reduced infrastructure investment due to proximity to Townsville
• Lower operational costs with established supply chains
• Faster path to production compared to remote locations

Why Should Investors Monitor Rokeby Resources?

Exceptional Discovery Momentum: The identification of two new high-grade prospects in a single programme demonstrates the project's expanding potential. Moreover, this validates Rokeby's systematic exploration approach.

World-Class Grades: Silver grades exceeding 1,200 g/t and copper grades above 5% place these discoveries among global high-grade leaders. Furthermore, this indicates potential for premium margin operations.

Multiple Development Pathways: With four active prospects across a large tenement package, Rokeby has created multiple value creation opportunities. For instance, these range from high-grade direct shipping scenarios to larger-scale development options.

Strategic Infrastructure Advantage: The Rokeby Resources Ltd Macauley Creek project's proximity to Townsville provides a significant competitive advantage. In addition, this enables reduced development costs and faster commercialisation pathways compared to remote projects.

Key Takeaway: Rokeby Resources has positioned itself as a premier high-grade silver-copper explorer in one of Australia's most prospective mineral belts. With exceptional grades confirmed across multiple prospects and systematic exploration delivering new discoveries, the company offers compelling upside potential as it advances toward defining a significant mineral resource.

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